OK, I think what you need to do is scale up the number of apiserver worker processes - pass the CLEARML_USE_GUNICORN=1 environment variable to the apiserver service, this should start 8 processes (by default) instead of one, and see if it helps. By the way, while this number (number of processes) can be set even higher, at some point, I assume you'll start having issues with load on the elasticsearch service, which is not that easy to scale up.